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RISS 인기검색어
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- 저자 : Toshiki Takamizawa (검색결과 1 건)
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Wear resistance of indirect composite resins used for provisional restorations supported by implants
Akimasa Tsujimoto,Carlos Jurado,Jose Villalobos-Tinoco,Wayne Barkmeier,Nicholas Fischer,Toshiki Takamizawa,Mark Latta,Masashi Miyazaki 대한치과보철학회 2019 The Journal of Advanced Prosthodontics Vol.11 No.4
PURPOSE. The aim of this study was to investigate simulated localized and generalized wear of indirect composite resins used for implant supported provisional restorations. MATERIALS AND METHODS. The study investigated ten indirect composite resins. Two kinds of wear were simulated by 400,000 cycles in a Leinfelder-Suzuki (Alabama) machine. Localized wear was simulated with a stainless-steel ball bearing antagonist and generalized with a flat-ended stainless-steel cylinder antagonist. The tests were carried out in water slurry of polymethyl methacrylate beads. Wear was measured using a Proscan 2100 noncontact profilometer in conjunction with Proscan and AnSur 3D software. RESULTS. Both localized and generalized wear were significantly different (P<.05) among the indirect composite resins. SR Nexco and Gradia Plus showed significantly less wear than the other indirect composite resins. The rank order of wear was same in both types of wear simulation. CONCLUSION. Indirect composite resins are recommended when a provisional implantsupported restoration is required to function in place over a long period. Although only some indirect composite resins showed similar wear resistance to CAD/CAM composite resins, the wear resistance of all the indirect composite resins was higher than that of bis-acryl base provisional and polymethyl methacrylate resins.
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